Ok, would be interesting to hear how helpful they are.
The 74A number is the WMU - Wildlife Management Unit (hunters need to know what WMU they are hunting in since each each WMU can have different hunting season start and end dates and different regulations); the MNR has detailed maps of each of the WMUs here:
http://www.ontario.ca/environment-an...t-unit-wmu-map
(Short link: http://goo.gl/jLI44g)
There is also a small map in the annual guide that the MNR publishes...here is a link to that:
Ontario Hunting Regulations Summary (see pages 12-17 in the 2014 guide).
The Ontario Hunter Education program covers this, FYI.